Can't install logstash plugins, trying to install them breaks the logstash installation

Elastic Stack Logstash
1

I'm trying to install the email plugin for logstash by using "logstash-plugin install logstash-output-email", however when I do it I get the following error:

Validating logstash-output-email
Installing logstash-output-email
Error Bundler::InstallError, retrying 1/10
An error occurred while installing logstash-core (5.6.2), and Bundler cannot continue.
Make sure that gem install logstash-core -v '5.6.2' succeeds before bundling.
WARNING: can not set Session#timeout=(0) no session context

After trying to install the plugin, my logstash won't start anymore and gives the error:

Bundler::GemNotFound: Could not find gem 'logstash-output-email (>= 0) java' in any of the gem sources listed in your Gemfile or installed on this machine.
verify_gemfile_dependencies_are_found! at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:328
each at org/jruby/RubyArray.java:1613
verify_gemfile_dependencies_are_found! at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:307
start at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:199
resolve at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/resolver.rb:182
resolve at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:192
specs at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:132
specs_for at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:177
requested_specs at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/definition.rb:166
requested_specs at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/environment.rb:18
setup at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler/runtime.rb:13
setup at C:/Users/Admin/logstash-5.6.2/vendor/bundle/jruby/1.9/gems/bundler-1.9.10/lib/bundler.rb:122
setup! at C:/Users/Admin/logstash-5.6.2/lib/bootstrap/bundler.rb:67
(root) at C:\Users\Admin\logstash-5.6.2\lib\bootstrap\environment.rb:u6708:

Even though this error message says that it can't find the gem in these sources, the files do contain the line gem "logstash-output-email". I'm really confused as to why I can't just install the plugin. Is there something I can do here to make sure the plugin get installed?

Thanks,
Andrew

2

Same issue on macOS Sierra and elasticsearch plugin

3

No help to be offered here? I'd really like to be able to install non-default plugins and searching for help has yielded nothing.

4

I have the same issue with 5.5.3.
c:\ELK\v553\logstash-5.5.3>bin\logstash-plugin.bat install logstash-output-datadog_metrics
Validating logstash-output-datadog_metrics
Installing logstash-output-datadog_metrics
Error Bundler::InstallError, retrying 1/10
An error occurred while installing logstash-core (5.5.3), and Bundler cannot continue.
Make sure that gem install logstash-core -v '5.5.3' succeeds before bundling.

After trying many other recommendations, but shying away from complicated ruby steps (since i don't know ruby), eventually i did what the error says to try ... Make sure that gem install logstash-core -v '5.5.3' succeeds before bundling.

c:\ELK\v553\logstash-5.5.3>vendor\jruby\bin\gem install logstash-core -v '5.5.3'
jar dependencies for logstash-core-5.5.3-java.gemspec . . .
org.apache.logging.log4j:log4j-api:2.6.2
org.apache.logging.log4j:log4j-core:2.6.2
com.fasterxml.jackson.core:jackson-core:2.7.4
com.fasterxml.jackson.core:jackson-databind:2.7.4
com.fasterxml.jackson.module:jackson-module-afterburner:2.7.4
com.fasterxml.jackson.dataformat:jackson-dataformat-cbor:2.7.4
Successfully installed logstash-core-5.5.3-java
1 gem installed

c:\ELK\v553\logstash-5.5.3>bin\logstash-plugin.bat install logstash-output-datadog_metrics
Validating logstash-output-datadog_metrics
Installing logstash-output-datadog_metrics
Installation successful

(it was not that simple though. At first the above step "c:\ELK\v553\logstash-5.5.3>vendor\jruby\bin\gem install logstash-core -v '5.5.3'" failed after downloading many gems because of a weird issue from a java jar that i am not sure how it reached!!!

ERROR: While executing gem ... (SystemCallError)
Unknown error - Unknown Error (123) - :c:\XXX\lib\com\fasterxml\jackson\core\jackson-databind\2.7.4\jackson-databind-2.7.4.jar
So i renamed XXX to YYY and ran again and it worked out.

5

maybe my response from a couple of days ago can help

6

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